package com.tanhua.dubbo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.core.task.TaskExecutor;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ThreadPoolExecutor;

@SpringBootApplication
@EnableAsync //开启Async的支持
public class MongoApplication {

    public static void main(String[] args) {
        SpringApplication.run(MongoApplication.class,args);
    }

    /**
     * 配置线程池
     *     io密集型
     *     cup密集型
     */
    @Bean("threadPool")
    public TaskExecutor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 设置核心线程数 -- 推荐 2n+1
        executor.setCorePoolSize(15);
        // 设置最大线程数
        executor.setMaxPoolSize(15);
        // 设置队列容量
        executor.setQueueCapacity(500);
        // 设置线程活跃时间（秒）
        executor.setKeepAliveSeconds(60);
        // 设置默认线程名称
        executor.setThreadNamePrefix("itcast-");
        // 设置拒绝策略 -- 多余的线程进入之后的淘汰方式
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        return executor;
    }
}